Messagebird’s Voice Calling API enables VOIP features for your web application to make, receive, and monitor voice calls from a MessageBird voice-enabled virtual mobile number to and from any country around the world through a REST API.
The Voice Calling API uses HTTP verbs and a RESTful endpoint structure with an access key that is used as the API Authorization. Request and response payloads are formatted as JSON using UTF-8 encoding and URL encoded values.